5.2 Gh
Its not the fastest, but the AMD 64 processor is still fast.
HTC Rezound
Basically the Quad is the fastest processor out of all them. A Processor's job is to process infromation from your actions to your computer the fastest.
Currently the Core i7 processor line is the fastest on the market, but very few laptop manufacturers will carry it, due to its heat consumption.
Intel is probably one of the fastest. Although there are some factors that play in with the speed of your processor. You need to figure out how much space you have left on your computer and what programs you are using in addition to the processor itself.
The Blackberry Pearl Q10 has the fastest processor in the entire Blackberry Pearl range. It is equipped with a 1.8ghz dual-core Snapdragon processor which is more than enough to handle the phone's daily needs.
Abacus
The sony 3000
Forthcoming Dual-Core Intel® Itanium® Processor
As of May 2013 the fastest computer processor which was commercially available was the Intel Core i3970X. Although, this came with a large price tag of $1100.
Apple no longer sells a 24" iMac. The fastest 21.5" is $1,699 with a 2.8GHz Quad Core Intel Core i7 processor. The fastest 27" is $2,199 with the 3.4 GHz Quad Core Intel Core i7 processor.